If you wish to replace a DFT, then the logical upgrade is the DMTR or DMTL which is a direct fit and compatible with the ordinal grey oval air filter housing by means of adaptor which is usually supplied.

Apologies, confusing things my end. It is the oil I use in the CVHs and you are right it is semi synthetic, and truthfully I did know that, just been a while.... actually I probably should do an oil change before curbs. It's the Shell 5w/40 that I also use copious amounts of that is FS https://www.o...

Clicking lifters quite common on anything but a fresh CVH / one in fine fettle. Doesn't sound great, but not something that should strike massive fear into you / be of grave concern. Does the tappet quieten if you rev the engine up? No harm in an "Italian tune up" :lol: Not all comparable grades of ...

Probably in part a failure due to poor prep and a cheap headgasket. You can pick up CA18 naturally aspirated head gaskets for a fraction of the price on eBay.... but at what cost? If the work was not done by anyone of particular repute or with an actual interest then they may well have cheapened on ...

I have "bottletop" type nuts which are plain / open and are normally fitted with plastic caps. Otherwise there are the closed type as used later on, but do not think I have an abundance of these spare / to spare.